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-.\" Copyright (c) 2003-2007 Tim Kientzle
-.\" All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\" $FreeBSD$
-.\"
-.Dd September 5, 2010
-.Dt BSDCPIO 1
-.Os
-.Sh NAME
-.Nm cpio
-.Nd copy files to and from archives
-.Sh SYNOPSIS
-.Nm
-.Brq Fl i
-.Op Ar options
-.Op Ar pattern ...
-.Op Ar < archive
-.Nm
-.Brq Fl o
-.Op Ar options
-.Ar < name-list
-.Op Ar > archive
-.Nm
-.Brq Fl p
-.Op Ar options
-.Ar dest-dir
-.Ar < name-list
-.Sh DESCRIPTION
-.Nm
-copies files between archives and directories.
-This implementation can extract from tar, pax, cpio, zip, jar, ar,
-and ISO 9660 cdrom images and can create tar, pax, cpio, ar,
-and shar archives.
-.Pp
-The first option to
-.Nm
-is a mode indicator from the following list:
-.Bl -tag -compact -width indent
-.It Fl i
-Input.
-Read an archive from standard input (unless overriden) and extract the
-contents to disk or (if the
-.Fl t
-option is specified)
-list the contents to standard output.
-If one or more file patterns are specified, only files matching
-one of the patterns will be extracted.
-.It Fl o
-Output.
-Read a list of filenames from standard input and produce a new archive
-on standard output (unless overriden) containing the specified items.
-.It Fl p
-Pass-through.
-Read a list of filenames from standard input and copy the files to the
-specified directory.
-.El
-.Pp
-.Sh OPTIONS
-Unless specifically stated otherwise, options are applicable in
-all operating modes.
-.Bl -tag -width indent
-.It Fl 0
-Read filenames separated by NUL characters instead of newlines.
-This is necessary if any of the filenames being read might contain newlines.
-.It Fl A
-(o mode only)
-Append to the specified archive.
-(Not yet implemented.)
-.It Fl a
-(o and p modes)
-Reset access times on files after they are read.
-.It Fl B
-(o mode only)
-Block output to records of 5120 bytes.
-.It Fl C Ar size
-(o mode only)
-Block output to records of
-.Ar size
-bytes.
-.It Fl c
-(o mode only)
-Use the old POSIX portable character format.
-Equivalent to
-.Fl -format Ar odc .
-.It Fl d
-(i and p modes)
-Create directories as necessary.
-.It Fl E Ar file
-(i mode only)
-Read list of file name patterns from
-.Ar file
-to list and extract.
-.It Fl F Ar file
-Read archive from or write archive to
-.Ar file .
-.It Fl f Ar pattern
-(i mode only)
-Ignore files that match
-.Ar pattern .
-.It Fl -format Ar format
-(o mode only)
-Produce the output archive in the specified format.
-Supported formats include:
-.Pp
-.Bl -tag -width "iso9660" -compact
-.It Ar cpio
-Synonym for
-.Ar odc .
-.It Ar newc
-The SVR4 portable cpio format.
-.It Ar odc
-The old POSIX.1 portable octet-oriented cpio format.
-.It Ar pax
-The POSIX.1 pax format, an extension of the ustar format.
-.It Ar ustar
-The POSIX.1 tar format.
-.El
-.Pp
-The default format is
-.Ar odc .
-See
-.Xr libarchive-formats 5
-for more complete information about the
-formats currently supported by the underlying
-.Xr libarchive 3
-library.
-.It Fl H Ar format
-Synonym for
-.Fl -format .
-.It Fl h , Fl -help
-Print usage information.
-.It Fl I Ar file
-Read archive from
-.Ar file .
-.It Fl i
-Input mode.
-See above for description.
-.It Fl -insecure
-(i and p mode only)
-Disable security checks during extraction or copying.
-This allows extraction via symbolic links and path names containing
-.Sq ..
-in the name.
-.It Fl J
-(o mode only)
-Compress the file with xz-compatible compression before writing it.
-In input mode, this option is ignored; xz compression is recognized
-automatically on input.
-.It Fl j
-Synonym for
-.Fl y .
-.It Fl L
-(o and p modes)
-All symbolic links will be followed.
-Normally, symbolic links are archived and copied as symbolic links.
-With this option, the target of the link will be archived or copied instead.
-.It Fl l
-(p mode only)
-Create links from the target directory to the original files,
-instead of copying.
-.It Fl lzma
-(o mode only)
-Compress the file with lzma-compatible compression before writing it.
-In input mode, this option is ignored; lzma compression is recognized
-automatically on input.
-.It Fl m
-(i and p modes)
-Set file modification time on created files to match
-those in the source.
-.It Fl n
-(i mode, only with
-.Fl t )
-Display numeric uid and gid.
-By default,
-.Nm
-displays the user and group names when they are provided in the
-archive, or looks up the user and group names in the system
-password database.
-.It Fl no-preserve-owner
-(i mode only)
-Do not attempt to restore file ownership.
-This is the default when run by non-root users.
-.It Fl O Ar file
-Write archive to
-.Ar file .
-.It Fl o
-Output mode.
-See above for description.
-.It Fl p
-Pass-through mode.
-See above for description.
-.It Fl preserve-owner
-(i mode only)
-Restore file ownership.
-This is the default when run by the root user.
-.It Fl -quiet
-Suppress unnecessary messages.
-.It Fl R Oo user Oc Ns Oo : Oc Ns Oo group Oc
-Set the owner and/or group on files in the output.
-If group is specified with no user
-(for example,
-.Fl R Ar :wheel )
-then the group will be set but not the user.
-If the user is specified with a trailing colon and no group
-(for example,
-.Fl R Ar root: )
-then the group will be set to the user's default group.
-If the user is specified with no trailing colon, then
-the user will be set but not the group.
-In
-.Fl i
-and
-.Fl p
-modes, this option can only be used by the super-user.
-(For compatibility, a period can be used in place of the colon.)
-.It Fl r
-(All modes.)
-Rename files interactively.
-For each file, a prompt is written to
-.Pa /dev/tty
-containing the name of the file and a line is read from
-.Pa /dev/tty .
-If the line read is blank, the file is skipped.
-If the line contains a single period, the file is processed normally.
-Otherwise, the line is taken to be the new name of the file.
-.It Fl t
-(i mode only)
-List the contents of the archive to stdout;
-do not restore the contents to disk.
-.It Fl u
-(i and p modes)
-Unconditionally overwrite existing files.
-Ordinarily, an older file will not overwrite a newer file on disk.
-.It Fl v
-Print the name of each file to stderr as it is processed.
-With
-.Fl t ,
-provide a detailed listing of each file.
-.It Fl -version
-Print the program version information and exit.
-.It Fl y
-(o mode only)
-Compress the archive with bzip2-compatible compression before writing it.
-In input mode, this option is ignored;
-bzip2 compression is recognized automatically on input.
-.It Fl Z
-(o mode only)
-Compress the archive with compress-compatible compression before writing it.
-In input mode, this option is ignored;
-compression is recognized automatically on input.
-.It Fl z
-(o mode only)
-Compress the archive with gzip-compatible compression before writing it.
-In input mode, this option is ignored;
-gzip compression is recognized automatically on input.
-.El
-.Sh ENVIRONMENT
-The following environment variables affect the execution of
-.Nm :
-.Bl -tag -width ".Ev BLOCKSIZE"
-.It Ev LANG
-The locale to use.
-See
-.Xr environ 7
-for more information.
-.It Ev TZ
-The timezone to use when displaying dates.
-See
-.Xr environ 7
-for more information.
-.El
-.Sh EXIT STATUS
-.Ex -std
-.Sh EXAMPLES
-The
-.Nm
-command is traditionally used to copy file hierarchies in conjunction
-with the
-.Xr find 1
-command.
-The first example here simply copies all files from
-.Pa src
-to
-.Pa dest :
-.Dl Nm find Pa src | Nm Fl pmud Pa dest
-.Pp
-By carefully selecting options to the
-.Xr find 1
-command and combining it with other standard utilities,
-it is possible to exercise very fine control over which files are copied.
-This next example copies files from
-.Pa src
-to
-.Pa dest
-that are more than 2 days old and whose names match a particular pattern:
-.Dl Nm find Pa src Fl mtime Ar +2 | Nm grep foo[bar] | Nm Fl pdmu Pa dest
-.Pp
-This example copies files from
-.Pa src
-to
-.Pa dest
-that are more than 2 days old and which contain the word
-.Do foobar Dc :
-.Dl Nm find Pa src Fl mtime Ar +2 | Nm xargs Nm grep -l foobar | Nm Fl pdmu Pa dest
-.Sh COMPATIBILITY
-The mode options i, o, and p and the options
-a, B, c, d, f, l, m, r, t, u, and v comply with SUSv2.
-.Pp
-The old POSIX.1 standard specified that only
-.Fl i ,
-.Fl o ,
-and
-.Fl p
-were interpreted as command-line options.
-Each took a single argument of a list of modifier
-characters.
-For example, the standard syntax allows
-.Fl imu
-but does not support
-.Fl miu
-or
-.Fl i Fl m Fl u ,
-since
-.Ar m
-and
-.Ar u
-are only modifiers to
-.Fl i ,
-they are not command-line options in their own right.
-The syntax supported by this implementation is backwards-compatible
-with the standard.
-For best compatibility, scripts should limit themselves to the
-standard syntax.
-.Sh SEE ALSO
-.Xr bzip2 1 ,
-.Xr tar 1 ,
-.Xr gzip 1 ,
-.Xr mt 1 ,
-.Xr pax 1 ,
-.Xr libarchive 3 ,
-.Xr cpio 5 ,
-.Xr libarchive-formats 5 ,
-.Xr tar 5
-.Sh STANDARDS
-There is no current POSIX standard for the cpio command; it appeared
-in
-.St -p1003.1-96
-but was dropped from
-.St -p1003.1-2001 .
-.Pp
-The cpio, ustar, and pax interchange file formats are defined by
-.St -p1003.1-2001
-for the pax command.
-.Sh HISTORY
-The original
-.Nm cpio
-and
-.Nm find
-utilities were written by Dick Haight
-while working in AT&T's Unix Support Group.
-They first appeared in 1977 in PWB/UNIX 1.0, the
-.Dq Programmer's Work Bench
-system developed for use within AT&T.
-They were first released outside of AT&T as part of System III Unix in 1981.
-As a result,
-.Nm cpio
-actually predates
-.Nm tar ,
-even though it was not well-known outside of AT&T until some time later.
-.Pp
-This is a complete re-implementation based on the
-.Xr libarchive 3
-library.
-.Sh BUGS
-The cpio archive format has several basic limitations:
-It does not store user and group names, only numbers.
-As a result, it cannot be reliably used to transfer
-files between systems with dissimilar user and group numbering.
-Older cpio formats limit the user and group numbers to
-16 or 18 bits, which is insufficient for modern systems.
-The cpio archive formats cannot support files over 4 gigabytes,
-except for the
-.Dq odc
-variant, which can support files up to 8 gigabytes.